Mariko has 30 nickels and dimes. she has 12 more nickels than dimes. how many dimes does mariko have?

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.